发明名称 |
TURBOFAN ENGINE OPERATION CONTROL |
摘要 |
A turbofan engine (10) is provided that includes a spool (14). The spool (14) supports a turbine (18) and is housed within a core nacelle (12). A fan (20) is coupled to the spool (14) and includes a target operability line. The target operability line provides desired fuel consumption, engine performance, and/or fan operability margin. A fan nacelle (34) surrounds the fan (20) and core nacelle (12) to provide a bypass flow path (39) having a nozzle exit area (40). A controller (50) is programmed to command a flow control device (41) for changing the nozzle exit area (40). The change in nozzle exit area (40) achieves the target operability line in response to an engine operating condition that is a function of airspeed and throttle position. A change in the nozzle exit area (40) is used to move the operating line toward a fan stall or flutter boundary by manipulating the fan pressure ratio. |
申请公布号 |
WO2008045079(A1) |
申请公布日期 |
2008.04.17 |
申请号 |
WO2006US40064 |
申请日期 |
2006.10.12 |
申请人 |
UNITED TECHNOLOGIES CORPORATION;MCVEY, WILLIAM J. |
发明人 |
MCVEY, WILLIAM J. |
分类号 |
F02K1/12;F02K1/16;F02K3/075 |
主分类号 |
F02K1/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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